Figure 7
Expression of Lox2 in developmental stages of Octopus vulgaris. Dorsal (D)–ventral (V), anterior (A)–posterior (P), and left (L)–right (R) axes indicate the orientation. All lateral views (A,B,D,E) with exception of (C) and (F) (posterior views). Stage XIV (A–C), stage XVIII (D–F). (A) In stage XIV, Lox2 is expressed faintly in the anterior region of the lateral lips (ll). Strong Lox2-expression was observed in the posterior region including the retractor muscle (rt) and the mantle rim (mri). (B) Lox2–expression is present in the retractor muscle. (C) In the posterior region, Lox2-expression is located in in the mantle rim, the gill lamellae (gl), the retractor muscle, the funnel rim, and the arm pillars III and IV (pf4). (D) Overview of the expression pattern of Lox2 (red) in the embryo during stage XIV. (E) In stage XVIII, Lox2-expression domains are located in the posterior region of the embryo, but there is faint expression in the lateral lips. (F) In the posterior region, the expression of Lox2 extends from the retractor muscles towards the funnel tube and ends in the ventral side close to the posterior transition zone, being also present in the pillars of the arm pair III. (G) On the posterior side, Lox2 is expressed in the posterior funnel rim, the funnel retractor (frc), and the mantle rim. (H) Overview of the expression pattern of Lox2 (red) in the embryo during stage XVIII. fg funnel gland, fu funnel, gl gill lamellae, ll lateral lips, pf3 arm pillar 3, ptz posterior transition zone, st statocyst, y yolk. Scale bars: 200 µm.
